The frequency response i get is 10Hz To 18Khz
Secondly
The HIP4081 or HIP4080 are meant to operate only at 80Volts maximum supply voltage.
What If some wants a AMP with supply Rails of an order of +-95VDC
Thirdly I am in INDIA and discreteness is my destiny thats why i have choosen the discrete gate drive for simplicity and cost effective ness

Replace the IN4007 with an ultra-fast diode like BYV26C or similar. But even more important, the floating rail that this diode pumps will get jolted to 56 volts when the lower fet turns on!!! WAY too much for the upper fet gate. Perhaps run the top of the diode to a ~15 volt or so ground referenced supply, and use 100uF across the floating driver rail in addition to what is there now. (can't see it while writing this).

Other than that, Good Man!

Edit -> Oh yeah, I see. The upper fet gate at most is only going to get as high as the +56v rail. The fet will never fully turn on, unlike the lower one. Spells even-harmonic distortion.

I understand your concerns about using "standard" discrete components. But I have some doubts about the performance of your high-side driver:

You don't limit the supply voltage of this driver which could in turn be dangerous for the driven Mosfet.
I don't know how fast the upper Mosfet can be turned on with this "VAS" using a mosfet and a pullup resistor.

Why do you use modulators that work with a sawtooth instead of a triangle ? Didi you ever attempt a switching amp that takes feedback from the output filter ?